Over the past decade, the use of microseismic monitoring, to optimize the completions and hydraulic fracturing stimulation treatments of complex unconventional reservoirs, has evolved into a widely accepted industry practice. The emergence of microseismic surveys has become especially pronounced in heavily fractured, ultra-low-permeability shale reservoirs, where the fractures created during hydraulic stimulation deviates greatly from the planar bi-wing textbook example that has long been the industry’s accepted image.